Improvement in door-bells



J. P. CONNELL.

Improvement in Door-Bells.

a fia UNITED STATES PATENT OFFICE.

JOHN P. CONNELL, OF KENSINGTON, CONNECTICUT.

IMPROVEMENT IN DOOR-BELLS.

Specification forming part of Letters Patent No. 132,199, dated October15, 1872.

new and useful Improvements in Door-Bells,

of which the following is a specification, reference being bad to theaccompanying drawing, in which- Figure l is a plan or top view of thebell with its concave sounding-shell removed, so as to show the interiorworking mechanism; Fig. 2 is a side elevation of the same from the sideA, showing, also, the sounding-shell, and representing it and thebase-plate as cut in section; and Fig. 3 is a side elevation of the samefrom the side B, but without the sounding-shell.

This invention is an improvement in that class of door-bells which areoperated by a pull-wire running through the back or baseplate of thebell.

The letter a indicates the base-plate, and b the pillar supporting thesounding-shell c. The letter d indicates the hammer-arm, pivoted on thepin al and d is the hammer-head. d is the spring which gives throw tothe hammer-arm. Overlying the hammer-arm is the cam-lever e, pivoted onthe pin (1 its back striking against the stop 01 affixed tothehammer-arm, so that the cam-lever can swing no further outward thanindicated by its position in the drawing. From the inner side of thecam-lever a pin, 0 projects, running through the guide 01 and on thispin is the spiral compression-spring e tending to keep the camleveralways against the stop d On the end of the cam-lever is the cam 6 Theletter f indicates the pull-wire lever, and f is the pull-wire runningthrough a hole in the baseplate. f is a spring tending to keep the leverf always in the position shown in the drawing.

When the lever f is pulled down it presses past the cam 6 carrying backthe hammerarm for a stroke, and when the pin f passes by the cam thehammer is tripped and sounds the bell. The spring f? carries the lever fback to position, the pin f passing up on the opposite side of the earn,the spring 0 allowing it to give way for this purpose.

I claim as my invention' The combination of the hammer-arm d, thecam-lever e and cam c and the pull-wire lever f, all constructed andoperating substantially as described, for the purpose set forth.

JOHN P. CONN ELL.

